Write IDL data in IRAF (OIF) format (.imh and .pix files).
Does the reverse of IRAFRD. IRAFWRT writes the "old" IRAF format
used prior to v2.11. However, this "old" format is still readable by
the current version of IRAF.
IRAFWRT, image, hdr, filename, [ PIXDIR = ]
image - array containing data
hdr - The corresponding FITS header. Use MKHDR to create a minimal
FITS header if one does not already exist.
filename - Scalar string giving the name of the file to be written
Should not include the extension name, which will be supplied
Optional Keyword Input
PIXDIR - scalar string specifying the directory into which to write
the IRAF pixel (.pix) file. The default is to write the pixel
file to the same directory as the header (.imh) file
Image array and FITS header are written to IRAF pixel file
'filename'.pix and header file 'filename'.imh
Write an empty 50 x 50 array of all zeros to an IRAF file named 'EMPTY'
IDL> im = intarr( 50, 50) ;Create empty array
IDL> mkhdr, hdr, im ;Create a minimal FITS header
IDL> irafwrt, im, hdr, 'empty' ;Write to a IRAF file named 'empty'
IRAFWRT gets information about the data - image dimensions, size,
datatype, maximum and minimum pixel values - and writes it into
the binary part of the header. The ASCII part of the header
is directly copied after deleting records with certain keywords
A pixel file is created, with a header in the first 1024 bytes
(1) The files are not created by IRAFWRT are not identical to those
created by the IRAF routine rfits. However, the files
created by IRAFWRT appear to be compatible with all the IRAF
routines tested so far.
(2) IRAFWRT has been tested on a limited number of data types
(3) IRAFWRT has only been tested on Unix and VMS systems.
FDECOMP, IS_IEEE_BIG(), ISARRAY(), REPCHR(), STRN(), SXDELPAR, SXPAR()
Written K. Venkatakrishna, STX February 1992
VMS compatibility W. Landsman April 1992
Work with headers without DATE-OBS or ORIGIN August 1992
Preserve HISTORY records with other FITS records March 1995
Fix case where a minimal FITS header supplied August 1995
Work under Alpha/OSF and Linux Dec. 1995
Make sureheader has 80 char lines, use IS_IEEE_BIG() May 1997
Don't apply strlowcase to .pix name W. Landsman April 1999
Work with double precision W. Landsman May 1999
Minimize use of obsolete !ERR W. Landsman Feb. 2000
Assume since V5.5, remove VMS support W. Landsman Sep. 2006